Comparison of Use Case Diagrams and Activity Diagrams

Use Case Diagram

Use Cases are scenarios that how the user uses the software system and achieves their goals.

Activity Case Diagram

Activity Case is more like to focus on a specific case in the whole program

Comparison of Use Case Diagrams and Activity Diagrams

For example, when you give an example about the Pizza party, first you created Use Case, It generally shows how the process will be working, “get the car, check your money, drive pizza store, get pizza and come back, etc. There are no any specifications.

But in the Activity case part, you have to explain the scene with more details. For example to get money from the bank, first, you have to insert your card, put your pin number, the bank will check your credit card and pin number. If they are okay, it will check your balance. If there are no any issues. It will let you get the money, according to your balance and daily limit. etc.